AbsFigure

package task.to.soft;

import java.io.*;
import java.util.*;

abstract class FigureGeneral {
    private double width;
    private double height;
    private String name;

    FigureGeneral(double width, double height, String name){
        this.width = width;
        this.height = height;
        this.name = name;
    }

    double getWidth(){ return width; }
    double getHeight(){ return height; }
    void setWidth(double width){ this.width = width; }
    void setHeight(double height){ this.height = height; }

    String getName(){ return name; }

    abstract public double area();
}

class Rectangle extends FigureGeneral {

    Rectangle(double width, double height, String name) {
        super(width, height, "rectangle");
    }

    public double area() {
        return getWidth() * getHeight();
    }
}

class Triangle extends FigureGeneral {

    Triangle(double width, double height, String name) {
        super(width, height, "triangle");


    }

    public double area() {
        return (getWidth() * getHeight()) / 2;
    }
}

class FigureReader {

        public ArrayList<FigureGeneral> readFromFile(String fileName) {

        ArrayList<FigureGeneral> list = new ArrayList<FigureGeneral>();
        try{
            File myFile = new File("test.txt");
            BufferedReader reader = new BufferedReader(new FileReader(myFile));

            String line = null;

            while((line = reader.readLine()) != null) {
                System.out.println(line);
                String[] lineElements = line.split(", ");
                FigureGeneral el;

                double x = Double.parseDouble(lineElements[1]);
                double y = Double.parseDouble(lineElements[2]);
                String name = lineElements[0];

                if((lineElements[0]).equals("triangle"))el =
                        new Triangle(x, y, name);
                else el = new Rectangle(x, y, name);
                list.add(el);
            }
            reader.close();
        }catch(Exception exc){
            exc.printStackTrace();
        }
        return list;
        }

        public String fromFigureGeneralToString(FigureGeneral figure){
            return null;
            }
}

class CollectionToFile {
    public void saveToFile(List<FigureGeneral> figureList, String fileName){
        try {
            FileWriter writer = new FileWriter(new File(fileName));
            writer.write(figureList.toString() + "\n");
            writer.close();
        } catch (IOException ex) {
            System.out.println("Can't write to file!");
            ex.printStackTrace();
        }
    }
}

class CollectionFromFile {
    @SuppressWarnings({ "rawtypes", "unchecked", "resource" })
    public ArrayList<FigureGeneral> fromStringToFigureGeneral(String line){
        ArrayList<FigureGeneral> list = new ArrayList<FigureGeneral>();
        try {
                File myFile = new File(line);
                FileReader fileReader = new FileReader(myFile);
                BufferedReader reader = new BufferedReader(fileReader);
                String line1 = reader.readLine();
                line1 = line1.substring(1, line1.length() - 1);
                list = new ArrayList(Arrays.asList(line1.split(", ")));
                return list;
        } catch (Exception ex) {
                System.out.println(ex.getMessage());
        }
        return list;
        }
}

public class AbsFigure {

    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) {

        FigureGeneral figures[] = new FigureGeneral[2];
        figures[0] = new Triangle(8.0, 12.0, "triangle right");
        figures[1] = new Rectangle(10, 4, "rectangle");

        for(int i = 0; i < figures.length; i++ ){
            System.out.print("Object is " + figures[i].getName());
            System.out.println(" Area is " + figures[i].area());
        }
    }
}